symfony app logger for creating name-spaced logs with ease

AppLogger.class.php

<?php

class AppLogger
{
  protected $fp = null;

  public static function log($message, $priority = 'info', $namespace = 'app')
  {
    if(sfConfig::get('app_loggers_'.$namespace) !== false)
    {
      AppLogger::getInstance($namespace)->doLog($message, $priority, $namespace);
    }
  }

  public static function &getInstance($namespace = 'app')
  {
    static $Loggers = array();

    if(!isset($Loggers[$namespace]))
    {
      $Loggers[$namespace] = new AppLogger(array('file'=> sfConfig::get('sf_log_dir').'/'.$namespace.'_'.sfConfig::get('sf_environment').'.log'));
    }

    return $Loggers[$namespace];
  }

  public function __construct($options = array())
  {
    if (!isset($options['file']))
    {
      throw new sfConfigurationException('You must provide a "file" parameter for this logger.');
    }

    $dir = dirname($options['file']);
    if (!is_dir($dir))
    {
      mkdir($dir, isset($options['dir_mode']) ? $options['dir_mode'] : 0777, true);
    }

    $fileExists = file_exists($options['file']);
    if (!is_writable($dir) || ($fileExists && !is_writable($options['file'])))
    {
      throw new sfFileException(sprintf('Unable to open the log file "%s" for writing.', $options['file']));
    }

    $this->fp = fopen($options['file'], 'a');
    if (!$fileExists)
    {
      chmod($options['file'], isset($options['file_mode']) ? $options['file_mode'] : 0666);
    }
  }

  public function doLog($message, $priotiry = 'info', $namespace)
  {
    flock($this->fp, LOCK_EX);
    fwrite($this->fp, strtr('%time% %type% [%priority%] %message%%EOL%', array(
    '%type%'     => $namespace,
    '%message%'  => $message,
    '%priority%'  => $priotiry,
    '%time%'     => @strftime('%b %d %H:%M:%S'),
    '%EOL%'      => PHP_EOL,
    )));
    flock($this->fp, LOCK_UN);
  }
}